Sim, S. F.; Mohd Sinang, F.; Kertini, D.; Collick, F.; Dankan, M. E.; Luncha, V. R. N.; Abdul Majid, N. S. Combining Essential Oils of Piper Betle and Myristica Fragrans for Enhanced Antimicrobial Properties. BJRST 2016, 3, 35-42.